DHCP client on wan interface - ip cleared

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DHCP client on wan interface - ip cleared

L1 Bithead

The wan interface on a PA-200 (PANOS 4.1.6) is set up as DHCP client, receiving ip-address from the ISP. When the lease period is out, the ip address is cleared with this message in System Log:

DHCP client cleared IP address on interface:ethernet1/1 due to: Lease expiry

The problem is that an admin has to manually request a new ip address, this is pretty annoying, especially when the ISP is using a lease time of 2 hours.

Anyone who knows a way to ensure that the ip address is not cleard, or at least automatically renewed?

Regards, Einar.


You are very welcome, good luck 😆

FWIW, it's a clear bug and the PA's behaviour is clearly non-rfc compliant. Very annoying as well.

Other devices (Cisco, PC's etc) have no issues at all either over here.

In fact, I am now using a cisco router to renew my DHCP lease, and have given the PA a static IP address = same as dhcp address. As long as the Cisco and the PA have the same IP address, both have the same MAC address (!), and all traffic but DHCP is filtered on the Cisco, it works. Cannot think of a dirtier/stranger way to work around the problem but it works quite well, I too had a lease time of 2 hours and frequent disconnects (I learned the same-MAC-address trick in the days that Checkpoint didn't support DHCP :-)).

Speaking of DHCP leases and bugs this seems to have been a neverending story for manufacturers of broadbandrouters such as D-Link and Netgear among others.

Looks like there are plenty of ISPs out there who does this differently in one way or another.

L0 Member

It seems I'm experiencing the exact same problem (on version 4.1.6), my other routers (Cisco & Draytek) don't have this issue and are getting a lease from the ISP within seconds.

Very annoying, hopefully their will be a patch soon.

Just a heads up that 4.1.7 has just been released, with the fix for the problem discussed here.

Sorry to inform you all, but the 4.1.7 release didn' help. I still got the 'DHCP client cleared IP address on interface:ethernet1/1 due to: Lease expiry'  on my PA-200...

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